I build products. AI multiplies, it doesn't replace.

More than ten years building applications, five of them with AI. I work across the whole cycle: scoping, UX/UI, frontend, backend, data, authentication, APIs, workflows, AI and deployment.

Portrait of David Joao in a dark jacket, backlit in orange.

A hybrid profile

Product+ UX/UI+ Development+ Data+ Automation+ AI= a product that runs.

Usually, that's six people and as many hand-offs. I bring them together, so nothing gets lost between two disciplines.

What I master. What I'm experimenting with. What I'm learning.

Telling the three apart is the least I can do when you trust me with a project.

I master

  • Supabase: database, authentication, storage, access rules
  • n8n, REST APIs and webhooks
  • Claude Code, Codex and Lovable to develop fast
  • UX/UI and product prototyping
  • Deployment on Vercel, Hostinger, OVH or a VPS
  • GitHub and continuous delivery

I'm experimenting with

  • AI agents that chain several actions
  • Evaluating the quality of an AI's answers
  • AI-assisted visual creation with Higgsfield
  • WebGL and shaders, as on this website

I'm learning

  • Very high-load architectures
  • Native mobile development
  • Advanced security certifications

When your project depends on them, I tell you before we start.

Small teams, augmented by AI.

One person who thinks in product terms and knows how to use AI can now deliver what took a small team not so long ago.

What can't be automated: understanding the problem, making choices, standing behind the quality of what you deliver. That is where I spend my time.

How I work.

Precise
I show what is built, and why.
Clear
Technology explained simply, without dumbing it down.
Results-driven
The business problem comes before the tool.
Visual
Demos, diagrams, prototypes: you see before you approve.
Credible
No promise I can't keep.

Also at the head of two agencies.

That is where I learned what a manual process costs, and what a system that runs is worth.

Enough about me. Let's talk about your problem.